Dear Dominic, Thank you very much for your responds. It is really helpfull. Though I have not yet checked the location of the pins 4/6 and pins 5/7.I hope they are at the same pin block with P9 which I located because it is indicated on the hackRF board. Further, please this is what I want to do. Please advice I want to track Satellite and receive satellite CW signal. When I receive it I want to determine the Time of arrival of the CW burst in Nanoseconds accuracy. What do you advice. I have my hackrf, gnuradio. In Gnuradio which blocks do I use. Can GRC work in Nanoseconds? Please advice
Secondly, I want to analyze the IQ signals on my oscilloscope as I track the satellite. Do you expect a significant change in the IQ signature on the oscilloscope immediately I receive the CW signal burst? Because I may need to see a characteristic change in IQ waveform so I know I received the CW burst. Thank you very much for you help. I'm grateful! Ernest. Sent from my BlackBerry 10 smartphone. Original Message From: Dominic Spill Sent: Sunday, March 13, 2016 12:23 PM To: ERNEST MATEY Cc: hackrf-dev Subject: Re: [Hackrf-dev] I Q signal on Oscilloscope On 13 March 2016 at 10:12, ERNEST MATEY <[email protected]> wrote: > > Thank you very much for responds. > > I had connected to P9 on my hackrf board before. Which pins did you connect to? > But as expected a I see only a single signal. I cannot justify if that is the > I component or the Q component. However I am wanting to see both components > ( two signals) for my analysis. How can I do this tapping the base band from > P9 as I did? It looks like pins 4/6 are RX Q (-/+) and 5/7 are RX I (-/+) > What are your suggestions for the levels on my oscilloscope? I have no idea, I don't think it should be a problem at all, the levels of those signals on HackRF are probably very small compared with the voltages most scopes can handle. Dominic > Sent from my BlackBerry 10 smartphone. > Original Message > From: Dominic Spill > Sent: Sunday, March 13, 2016 9:27 AM > To: ERNEST MATEY > Cc: hackrf-dev > Subject: Re: [Hackrf-dev] I Q signal on Oscilloscope > > On 13 March 2016 at 07:01, ERNEST MATEY <[email protected]> wrote: >> >> I purchased HackRf one about a month ago. It is a great receiver. >> However for my application, I need to analysis I Q signals on oscilloscope. >> How can I get these two signals from the hackRF board >> >> The Q signal on one channel, and I signal on another channel. >> How can I achieve this from the board? > > The P9 header on the board allows you to access the baseband [1]. > You'll need to make sure that the levels are appropriate for your > scope, but I would imagine that they should be fine. You can see the > hardware design files in the HackRF repository[2], and you should > consult those for the pin connections. > > Thanks, > Dominic > > [1] https://github.com/mossmann/hackrf/wiki/HackRF-One#expansion-interface > [2] https://github.com/mossmann/hackrf/ _______________________________________________ HackRF-dev mailing list [email protected] https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
